If the patient currently has high blood pressure, but is not dizzy. This condition means that the patient has had high blood pressure for a long time and it is not well controlled. Even though the blood pressure is elevated, the patient does not feel it because it has been tolerated. If the blood pressure is controlled within the standard range, the patient may feel dizzy and uncomfortable. For such patients it is relatively more dangerous, because there is no feeling, so it is possible that the attention will not be raised. However, patients must be advised to take active antihypertensive treatment. Patients are advised to take long-acting first-line oral antihypertensive drugs, and the cause of hypertension can also be further identified, such as doing tests related to hypertension, such as adrenal CT, head CT, renal vascular ultrasound and hypertension six, to further identify whether the current hypertension is primary or secondary hypertension.